Intrusion detector



FIG. 1 is a perspective view of an intrusion detector showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being substantially a mirror image;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view taken from the left of FIG. 1, the right side elevational view being substantially a mirror image;

FIG. 5 is a front elevational view thereof. 

The ornamental design for an intrusion detector, as shown. 